Make reference to Bioconda/pydna

[BjornFJohansson]

Someone is maintaining a conda package at bioconda:

https://anaconda.org/bioconda/pydna

We could refer to this in an unobtrusive way in the new readme.

[manulera]

Hi @BjornFJohansson sure! To be honest, I have never really understood very well what conda / bioconda etc. are. As in, what's the difference between that and the pypi package? Is it just a mirror?

In general, do we want to recommend to install from a place that we don't maintain?

[BjornFJohansson]

I think it could be useful for someone that for some reason can not use PIP. I have no idea why that would be. I used to maintain a conda package since biopython did not install with PIP on Linux and with a conda package both could be installed with one command.

Inclusion in Bioconda could be seen as a stamp of approval?

The Bioconda package is always lagging, so it is important to say that it is the least preferred way to install.